E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/59
E21B 23/00 (2006.01) E21B 23/02 (2006.01) E21B 31/20 (2006.01)
Patent
CA 1275915
ABSTRACT OF DISCLOSURE An improved running pulling tool having mounted on an elongate mandrel releasable means for engaging an internal fishing neck on a well tool, means for locking the engaging means in fishing neck engaging position on the mandrel and means to unlock and move the engaging means to a position on the mandrel retracting the dogs and releasing the pulling tool from the fishing neck. The improved structure provides a tool which may be jarred upwardly on or jarred downwardly on as long as required and which may be released from the well tool fishing neck when desired. When the tool is jarred downwardly on, it will operate to release if either the skirt or mandrel contact the well tool. Positioning means on the tool allow positioning the engaging and releasing means skirt in contact with dog shoulders, eliminating costly precision machining and providing more area to absorb jarring impact on the tool. The improved tool includes means for manual release from a fishing neck and means to aid in preparing the tool for further use.
547764
Bullard Roy P.
Otis Engineering Corporation
Riches Mckenzie & Herbert Llp
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